— Oh, sorry for that, i just checked the admob area for some reason i was confusing it with adsense or some other advertising company that was looking similar but had that option... only used ads 2-3 years ago then dropped them they are not worth the damage that they do to your user flow(my suggestion is changing to video-ads or iaps), yea so ... it seems based on scirra documentation the ad banner show at bottom by default, if you want to change the position you need to find or add the following lines in androidmanifest.xml
android:layout_alignParentBottom="true"
to android:layout_alignParentTop="true"
here is an answer that might help you admob top or bottom of image
the last response is solving the overlay bottom, and the one above it solves the top alignment(in the link attached).
you need to open the project exported in android studio, or cordova manager type of software and find the file that contains that data and change those lines if they exist, usually should be in the androidmanifest.xml
as by default might be placed at the bottom... that is if there is a relativelayout, Nepeo might be able to answer that.
if there is no line already like that existing you need to be adding those lines above and customizing the width and height based on your ad banner type check the link for more details on that, or Google Import the Mobile Ads SDK once you done export from android studio or your project editor to apk signed or unsigned.
also Construct mobile-advert explains the ad banners for Construct 3.